doc: edit stability text for clarity and style

PR-URL: #11112
Reviewed-By: Timothy Gu <[email protected]>
Reviewed-By: Italo A. Casas <[email protected]>
Reviewed-By: Claudio Rodriguez <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>

Author: Trott

doc/api/documentation.md

@@ -58,7 +58,7 @@ is a high priority, and will not be broken unless absolutely necessary.
 
 ```txt
 Stability: 3 - Locked
-Only fixes related to security, performance, or bug fixes will be accepted.
+Only bug fixes, security fixes, and performance improvements will be accepted.
 Please do not suggest API changes in this area; they will be refused.
 ```